Double glazing.



W. F. GRITTALL.

DOUBLE GLAZING.

APPLICATION FILED MAY12, 1914.

1,11 7,340w Patented Nov. 17, 1914.

65. Z r] m STATES PATENT OFFICE.

WALTER FRANCIS CRITTALL F B BAINTREE, ENGLAND, ASSIGNOE TO THE CBI'ITALL MANUEAGTUBINGCOMPAN'Y, LIMITED, OF BBAINTBEE,

sustain).

, DOUBLE GLAZING.

Specification 0! Letters Patent.

Patented Nov. 1'7, 1914.

Application med May 12, 1914. Serial m. asaoas.

To all whom it may concern:

Be it known that I, WALTER FRANCIS CRI'I'I'ALL, a subject of the King of Great Britain, residing at Manor Works, Braintree, in the county of Essex, England, have invented new and useful Improvements in Double Glazing, of which the following is a. specification.

In double glazing there is difliculty in making a neat and airtight joi between the two sheets of glass because t e putt between them squeezes up irregularly an cannot be gotat and therefore cannot be pressed or trimmed.

According to this invention a Z shaped strip is interposed between the two sheets of glass all around their edges, this strip preventing the putty from squeezing up when the sheets are pressed toward each other and forming a distance piece between the sheets.

The invention is applicable both to wooden and metal frames.

The drawing is a section of a metal framed window constructed according to this invention.

a b are the two sheetsof glass, 0 c are metal bars welded together at the corners and forming the frame of the window.

d d are metal strips secured to the bars 0 c by screws e e.

f is an ordinary putty joint between the glass a and the bars a, and g is a similar oint between the glass 1) and the stri s (1!.

and b. When in making the joints the sheet-'- b is pressed toward the sheet a the inner branch of the Z is ni ped between the sheets and the putty of t e joint 7' is prevented from being squeezed inward.

What I claim is v 1. The combination of a frame, two sheets of glass in the frame, a Z shaped strip interposed between the two sheets and putt filling the triangular spaces between the and the two sheets of glass. I

2. The combination of a frame, two sheets of glass in the frame, a Z shaped strip interposed between the two sheets, one of the branches of the 2 being longer than the other and lying between the frame and the edge of one of the sheets and putty filling the triangular spaces between the Z and the two sheets of glass.

WALTER FRANCIS CRITTALL.

Witnesses:

VALENTINE Gaonen Cm'rrem, O. J. Worrrn. 

